Examine source code of Halloween Sonata

{
  "theme": {
    "images": {
      "theme_frame": "header516.jpg"
    },
    "colors": {
      "frame": "#d6cfcf",
      "tab_background_text": "#ca9b33"
    }
  },
  "version": "2.0",
  "name": "Halloween Sonata",
  "manifest_version": 2,
  "description": "Halloween Phantom on the piano."
}